Island



(No Model.)

J. W. SARGEN-T.

CONSTRUCTION OF BALANCE WHEELS. No. 590,554, Patented Sept. 21,;189'7.

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.IOIIN IV. SARGENT, OF PROVIDENCE, RIIODE ISLAND.

CONSTRUCTION OF BAL ANCE-WH EELS.

- SPECIFICATION forming part of Letters Patent No. 590,554, datedSeptember 21, 1897.

App ication filed November 6, 1896. Serial No. 611,294. (No model.)

citizen of the United States, residing at Providence, in the State ofRhode Island, have invented a new and useful Improvement in theConstruction of Balance JVheels, of which the following is aspecification.

The object of myinvention is to provide a joint of the maximum strengthbetween the segments of the rim of a balance-wheel in order to preventtheaccidental burstingof the rim when the wheel is subjected toaccelerated speed; and my invention consists in providing the segmentsof the wheel with a lapped joint, the engaging shoulders of which extendinwardly from the periphery of the rim to its inner surface at the sideof the rimsegments, whereby the maximum of strength in the rim may besecured.

In the accompanying drawings, Figure 1 represents a side elevation ofabalance-wheel embodying my improvement, a portion of one of the rimsegments being broken away. Fig. 2 represents an edge view of the same.3 represents an inner view of one of the segments. Fig. 4 represents thelapped joint as formed with the engagement of single opposite shouldersinstead of a series of shoulders, as in Fig. 2. Fig. 5 represents adetail view of a rim in which the en gagingshoulders have a radialdirection, as shown by the dotted lines.

In the drawings, A represents the balancewheel; B, the hub of the wheel;0 O, the arms bolted to the hub, andD D the rim-segments, which arebolted to the arms, with two arms to each segment.

The rim-segments D D are provided with the opposite shoulders a a a,made parallel to each other and extending from the periphery b of therim to its inner surface a, as shown in Figs. 1 and 3. The oppositeshoulders at o. a of the rim-segments may also be made in a radialdirection, as shown by the dotted lines in Fig. 5, but the parallel formof construction is preferred on account of the in creased facility forplaning the surfaces of the said shoulders to properly fit each other.The ends of the rim-segments are clamped together laterally by means ofthe bolts cZ cl, and are also secured against lateral movement by meansof the keys e 6, held in the key-seats e e.

In carrying out my improvement a joint formed of single interlockedshoulders a, as shown in Fig. 4, maybe employed,but greater strengthwill be secured in the joint by means of a plurality of interlockedshoulders, as shown in Fig. 2, the increase of strength beingproportioned to the increase in the number of shoulders a employed inthe lap-joint, and the closely-fitting shoulders at a of the segmentsoperate to resist the bursting strain caused by accelerated speed, whilethe bolts cl and keys 6 serve to hold the rim-segments firmly togetherin a lateral direction.

I claim as my invention- 1. In a balance-wheel, the rim-segmentsprovided with the laterally-projectin g hookshoulders arranged at oneside of each segment, and adapted for lateral interlocked engagementwith each other, end to end and side by side, substantially asdescribed.

2. In a balance-Wheel, the combination of the rim-segments provided withthe laterallyprojecting hook-shoulders arranged at one side of eachsegment, and adapted forlateral interlocked engagement with each other,end to end and side by side, with the keys adapted to prevent lateralunlocking movement, substantially as described.

3. In a balance-wheel, the combination of the rim-segments provided withthe laterallyprojecting hook-shoulders arranged at one side of eachsegment, and adapted for lateral interlocked engagement with each other,end to end and side by side, with the keys, and the transverse boltsadapted to hold the segments firmly together in their interlockedcondition, substantially as described.

JOHN W. SARGENT.

\Vitnesses:

SOCRATES SCHOLFIELD, FRANK CANNON.

